those twin girls have leukemia undergoing chemotherapy. the family is tooped out financially. their donations surpassed $25,000 in less than a month. >>> now to politics and a new report from "the washington post" that examines whether campaigns really change voters' minds. i'm joined now by the author of that article, the post's paul far hi and larry sabatosabato, gentlemen. >> hi, alex. >> paul, i will go first to you. this is a fascinating article. you write about one man who's called every popular election vote correctly, even within like 2 percentage points since 1992. tell us about that. >> yes. this is allen brom owe wits a political science professor at emery university. but he is not entirely unique. a number of forecasters do this with some precision every single election. it's because elections are themselves fairly predictable. you don't have to wait until october, you don't have to wait for the polls in november to know approximately or at least with some precision how things are going to turn out. that's what dr. abrom owe wits and other forecasters do. >> here's